Our Terms of Service can be found here:

https://leanpub.com/terms

The entirety of our Terms of Service apply, but potential purchasers may be particularly interested in this section of the Terms:

10.5 Licence Grant to a Purchaser of Products

Please note that typically, when someone is buying a book on behalf of someone else, including a colleague or another employee in the same organization, they use the option to buy the book using this process:

http://help.leanpub.com/en/articles/110740-i-would-like-to-purchase-a-book-as-a-gift-for-someone-else-how-can-i-do-this